A seabed flying lead protection device and method of installation thereof

Abstract

The application discloses a seabed flying wire protection device, which comprises two parallel main plates and a flying wire cross beam, the flying wire cross beam is provided with a placing groove for placing a flying wire, the two ends of the flying wire cross beam are fixedly connected with the two main plates respectively, and a vibration sinking frame is further fixedly connected between the main plates, and a vibration hammer is detachably fixedly connected on the vibration sinking frame. In addition, the application further discloses a mounting method of the device, by integrating the vibration hammer into the protection device, the mounting time of the protection device is shortened, the number of divers is reduced, compared with the existing mounting mode, the protection device can only have one diver responsible for monitoring during installation, and the rest of the vibration sinking action is automatically operated by a computer, so that the leasing and use time of the installation equipment can be effectively shortened, and the safety of the diver during operation can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, and more particularly, to a seabed flying line protection device. In addition, the present application also relates to a method for installing the seabed flying line protection device. BACKGROUND

[0002] With the continuous development of large deepwater oil and gas fields, the transmission and distribution of liquid power, electricity and communication signals of numerous underwater Christmas trees or gas trees and underwater production facilities such as manifolds and the like become increasingly important, and the stability thereof is directly related to whether a production block can operate normally. The electric flying line, liquid flying line and optical flying line of the underwater production system are important underwater channels that bear this function, and are actually the underwater "lifeline", which is mainly used for transmitting instructions and signals from the upper platform to the underwater equipment, and the operating conditions of the underwater equipment are also fed back to the upper platform through the control system. In this way, the operator can remotely operate the underwater equipment while monitoring the working conditions and data of the underwater equipment.

[0003] The seabed flying line is similar in structure to the submarine optical cable. The existing submarine optical cable laying method mainly uses a high-pressure water column to flush away the submarine silt to form an optical cable trench, and then lays the optical cable on the optical cable trench, and finally covers the silt on both sides on the optical cable. However, since the flying line is usually connected to the electric / liquid distribution unit of the underwater manifold and the underwater Christmas tree or gas tree, the relative distance between them will not be too long, and the existing submarine optical cable laying method is not suitable for the laying of the flying line. In order to protect the seabed flying line, a protection groove is usually installed on the laying path of the flying line, and the protection groove is generally cylindrical or square tubular. The flying line is first pre-buried in the protection groove, and then the protection groove is sunk into the seabed together. However, in the actual installation process, it often needs multiple divers to work together to complete the installation. First, the diver needs to slowly move the protection groove to the correct path, and then two divers or one diver in a back-and-forth manner implement vibration sinking at both ends of the protection groove to ensure that the protection groove is inserted into the seabed in a relatively horizontal posture, and if the inclination angle is too large, it may cause damage to the flying line. In this process, the diver needs to first float to the construction ship to take the vibration hammer, then dive to the seabed to vibrate the protection groove, and then carry the vibration hammer and check whether the entire flying line is installed in place. Because the hitting point of the vibration hammer needs to be positioned, and the vibration hammer needs to be carried, the time cost and labor cost of this process is undoubtedly huge, for example, the daily rental of a similar construction ship is as high as 200,000 yuan.

[0004] Based on the above reasons, the present application provides a seabed flying line protection device and a method for installing the same to improve the installation efficiency and reduce the installation cost. SUMMARY

[0005] The present application aims to overcome the defects of the prior art, such as the inconvenience and high cost in installation of seabed flying wire protection groove, and provides a seabed flying wire protection device and an installation method thereof.

[0006] The technical scheme adopted by the present application is as follows:

[0007] The seabed flying wire protection device comprises two parallel main plates and a flying wire beam, the flying wire beam is provided with a placing groove for placing the flying wire, the two ends of the flying wire beam are fixedly connected with the two main plates respectively, and a vibration sinking frame is further fixedly connected between the main plates, and a vibration hammer is detachably fixedly connected to the vibration sinking frame.

[0008] The working principle of the present application is as follows: the main plates and the flying wire beam are assembled and fixed on land or on a construction ship, the main plates are placed in parallel, the flying wire beam is arranged between the two main plates and is welded to form a whole. Then, before laying the seabed flying wire, the pipe mouth is positioned and the flying wire path is set. The welded main plates and flying wire beam are lowered to the seabed flying wire path on the construction ship by using a winch, when the bottom of the main plate abuts against the seabed flying wire path, a diver starts the vibration hammer to sink the main plate and the flying wire beam, and the main plate and the flying wire beam are driven into the silt of the seabed until the top of the main plate is flush with the mud surface.

[0009] Further, the vibration hammer comprises a vibration hammer body and a connecting plate which are fixedly connected, the vibration sinking frame is provided with a through hole for the vibration hammer body to pass through, after the vibration hammer body passes through the through hole, the connecting plate abuts against the vibration sinking frame, and the two are fixedly connected by bolts at this time. The vibration hammer body is provided with a hydraulic oil inlet and a hydraulic oil outlet, in the process of vibration sinking, the hydraulic oil inlet and the hydraulic oil outlet are connected with hydraulic pipelines respectively, hydraulic oil is input into the vibration hammer body to provide a power source for vibration sinking.

[0010] Further, in order to bury the present application into the silt by the vibration hammer, the vibration sinking frame is composed of two side plates and a top plate, the two sides of the side plates are fixedly connected with the two main plates respectively, and the top plate is flush with the bottom of the flying wire beam. The vibration sinking frame is uniformly distributed at the two ends of the present application to balance the stress. In use, the vibration sinking frame is driven to insert the main plate into the seabed under the reciprocating knocking of the hydraulic vibration hammer, and part of the silt on the seabed is extruded to the outside of the main plate. The vibration sinking frame is welded with the main plate, the upper surface of the top plate is flush with the bottom of the flying wire beam, and the welding does not affect the placement of the flying wire and the installation of the cover plate. It should be noted that, in order to ensure that the vibration sinking frame does not deform during the vibration sinking process, a plurality of triangular rib plates connecting the side plates and the top plate are arranged between the side plates and the top plate, and the triangular rib plates increase the rigidity between the top plate and the side plates.

[0011] Further, the bottom of the main plate is bent to form an inclined plate towards the flying line beam, and a gap is left between the inclined plates. During the process of vibration sinking, the inclined plates at the bottom of the main plate will extrude part of the silt to the outside of the main plate, and the rest of the silt will enter the inside of the main plate through the gap between the two inclined plates. The silt on both sides of the main plate will form extrusion on the inclined plates. When subjected to lateral external force (due to ship anchors or fishing nets dragging), the silt inside can greatly prevent the main plate from tilting and overturning, thereby avoiding the dragging of the ship anchor or fishing net on the present application, and protecting the flying line. At the same time, when the main plate is buried in the silt or pulled out of the silt, the silt can flow through the gap between the two main plates, which is beneficial to reduce the resistance of sinking or pulling out, and it is more labor-saving to install or pull out compared with the completely sealed protection groove. After installation is completed, the main plate, flying line beam and cover plate are placed below the mud surface, without protruding parts, and are not easy to be dragged by ship anchors, fishing nets and the like; usually, the ship anchor is about 5-10 cm deep into the mud surface. Even if it is dragged to the main plate by the ship anchor or fishing net, the ship anchor will overturn and jump over the cover plate due to the longer main plate providing greater anti-overturning force, and the center of gravity of the ship anchor being above the cover plate and the stabilizing effect of the silt, which will not cause dragging in actual simulation. The inner angle between the inclined plate and the main plate is 100°-140°, preferably 120°; if the inner angle between the inclined plate and the main plate is too small, it will not be able to extrude the silt on the seabed to the outside, resulting in not labor-saving during the process of vibration sinking; and if the inner angle is too large, the silt cannot provide enough downward pressure between the two main plates, affecting the anti-overturning ability of the present application.

[0012] Further, the top of the main plate is also provided with a cover plate for covering the flying line; the flying line beam has a structure with protrusions at both ends and a recess in the middle, the recess is a placing groove for placing the flying line, and the protrusions at both ends are connected with the cover plate. The upper surface of the protrusions at both ends of the flying line beam is about 20 mm away from the top of the main plate, which is matched with the thickness of the cover plate, and after the cover plate is installed, it is ensured that the cover plate will not protrude outside the main plate. The connection between the cover plate and the flying line beam is preferably a buckle connection.

[0013] Further, the inner side of the main plate is provided with a plurality of first sacrificial anodes. Traditionally, sacrificial anodes are made of zinc alloy, hence the name "zinc block", but they can also be made of magnesium or a special aluminum alloy. Since the main plate is immersed in seawater for a long time, in order to protect the metal structure of the main plate from being damaged by corrosion, the inner side of the main plate is provided with a plurality of first sacrificial anodes connected with the main plate. Under the immersion of seawater, the first sacrificial anodes are consumed by electrochemical corrosion, thereby "replacing" the consumption of the main plate, playing a protective role for the main plate. It should be noted that the bottom of the cover plate is also provided with a plurality of second sacrificial anodes, which are also consumed by electrochemical corrosion, thereby playing a protective role for the cover plate.

[0014] Further, the application further comprises several inner reinforcing rib plates, which are inverted trapezoids, two oblique edges of which are fixedly connected with two inclined plates respectively, and a gap between the short edge of the inner reinforcing rib plate and the main plate is flush. The inner reinforcing rib plate can increase the structural rigidity of the main plate, ensure that the main plate does not produce plastic deformation in the process of sinking, reduce the gravity center of the application, and improve the anti-overturning capacity, so that the application is not easily towed when being hung by anchors, fishing nets and the like. At the same time, when the main plate is lowered to the seabed by the winch, due to the influence of the gravity center of the inner reinforcing rib plate, the main plate can maintain the correct descending angle during the lowering process and will not overturn. The inner reinforcing rib plate is preferably made of a material with high hardness and high density.

[0015] The application further provides a mounting method for the seabed flying line protection device, comprising the following steps:

[0016] Step S1, after the underwater manifold and the underwater Christmas tree are installed, the connecting ports of the two devices are positioned, and the installation path of the seabed flying line protection device is set;

[0017] Step S2, the seabed flying line protection device is lowered to the seabed from the construction ship by using the winch, and the diver moves it above the installation path set in step S1;

[0018] Step S3, the hydraulic pipeline is pulled down from the construction ship, the hydraulic pipeline is connected with the vibration hammer on the seabed flying line protection device, the vibration hammer is started, and the seabed flying line protection device is subjected to a downward pressure;

[0019] Step S4, the installation of the main body of the seabed flying line protection device is completed, and the hydraulic pipeline is recovered;

[0020] Step S5, after the laying of the flying line is completed, the seabed flying line protection device is closed, specifically, a cover plate is covered on the seabed flying line protection device.

[0021] Further, the specific operation process of step S3 is that the diver respectively inserts the male head of the hydraulic pipeline into the hydraulic oil inlet and the hydraulic oil outlet provided on the vibration hammer, after the main plate is initially kept upright, the hydraulic control switch is started through the control room on the construction ship, the vibration hammer reciprocatingly sinks under the action of the hydraulic pressure, the main plate is buried under the seabed through the vibration transmission of the vibration sinking frame.

[0022] Further, the specific operation process of the step S5 is that the construction ship crane lowers the flying line, the diver pulls the flying line to the interfaces of the two connecting devices respectively, and then places the flying line on the upper surface of the flying line beam; wherein the liquid flying line is heavy and needs to be placed in the horizontal disc, a proper amount of floating bag is installed at the end of the flying line to make the liquid flying line basically suspended, then the diver moves the liquid flying line above the main plate and removes the floating bag one by one to place the liquid flying line on the upper surface of the flying line beam. After the flying line is correctly placed, the construction ship lowers the cover plate and the plastic plate, and the diver places the cover plate between the main plates and abuts against the flying line beam to completely cover the flying line; for the gap between the two adjacent seabed flying line protection devices, the diver cuts the plastic plate to the size of the gap according to the shape and size of the gap, and places it under the cover plate to press and block the gap.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] 1. The present application integrates the vibration hammer into the protection device, which not only shortens the installation time of the protection device, but also reduces the number of divers. Compared with the existing installation method, the protection device can only have one diver responsible for monitoring during installation, and the remaining vibration sinking operation is automatically operated by the computer, which can effectively reduce the rental and use time of the installation equipment (such as the construction ship); the diver does not need to carry the vibration hammer for operation, so the safety of the diver during operation can be improved.

[0025] 2. The gap between the two main plates of the present application allows part of the silt to flow out from the gap when buried in the seabed, which makes the vibration sinking process more labor-saving. Meanwhile, the bottom of the main plate is provided with an inclined plate, which can produce an insertion effect with the silt of the seabed after being buried in the seabed. When subjected to lateral external force, the silt on the inner side can greatly prevent the main plate from tilting and overturning, thereby avoiding the towing of the present application by the ship anchor or fishing net and achieving the technical effect of protecting the flying line. The overall structure of the present application is simple, and the manufacturing and use costs are low, which can be used in shallow or deep sea environment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the overall structure schematic diagram of the seabed flying line protection device of the present application;

[0027] Figure 2 It is the overall structure schematic diagram of the seabed flying line protection device of the present application; Figure 1

[0028] Figure 3 It is the structure schematic diagram of the vibration sinking frame and the vibration hammer of the present application;

[0029] Figure 4 It is the structure schematic diagram of the vibration sinking frame and the vibration hammer of the present application; Figure 3

[0030] ​​Figure 5 Flow chart of the installation method of the seabed umbilical protection device according to the present application;

[0031] In the drawings:

[0032] 1-main plate; 101-inclined plate; 2-umbilical beam; 3-cover plate; 401-first sacrificial anode; 402-second sacrificial anode; 501-first through hole; 6-vibration sink; 601-side plate; 602-top plate; 603-rib plate; 7-inner reinforcing rib plate; 8-vibration hammer; 801-vibration hammer body; 802-connection plate; 803-hydraulic oil inlet; 804-hydraulic oil outlet; 805-hot stab male head. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with specific embodiments. The drawings are only used for illustrative description and cannot be understood as limiting the patent; in order to better illustrate the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0034] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "front", "back", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for illustrative description, and cannot be understood as limiting the patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0035] Example one:

[0036] Referring to Figure 1 and Figure 3The embodiment provides a seabed flying wire protection device, which comprises two parallel main plates 1 and a flying wire cross beam 2, the flying wire cross beam 2 is provided with a placing groove for placing a flying wire, the flying wire cross beam 2 is fixedly connected with the two main plates 1 at two ends respectively, and the main plates 1 and the flying wire cross beam 2 are provided with a cover plate 3. The main plates 1 are further fixedly connected with a vibration sinking frame 6, and the vibration sinking frame 6 is detachably fixedly connected with a vibration hammer 8. The main plates 1 and the flying wire cross beam 2 are both made of common carbon steel, and the surface is sprayed with anticorrosive paint; and the main plates 1 and the flying wire cross beam 2 are welded and assembled on land or on a construction ship in advance.

[0037] Referring to Figure 5 The embodiment further provides an installation method of the seabed flying wire protection device, which comprises the following steps.

[0038] In step S1, after installation of a subsea manifold and a subsea Christmas tree is completed, the connecting ports of the two devices are positioned, and the installation path of the seabed flying wire protection device is set.

[0039] In step S2, the seabed flying wire protection device is lowered to the seabed from a construction ship by using a winch, and then is moved above the installation path set in step S1 by a diver.

[0040] In step S3, a hydraulic pipeline is pulled down from the construction ship, the hydraulic pipeline is connected with the vibration hammer 8 on the seabed flying wire protection device, the vibration hammer 8 is started, and a downward pressure is generated on the seabed flying wire protection device.

[0041] In step S4, installation of the main body of the seabed flying wire protection device is completed, and the hydraulic pipeline is recovered.

[0042] In step S5, after the flying wire is laid, the cover plate 3 is placed in the seabed flying wire protection device.

[0043] In step S3, the diver inserts the hot stab male head 805 of the hydraulic pipeline into the hydraulic oil inlet 803 and the hydraulic oil outlet 804 arranged on the vibration hammer 8, the main plates 1 are kept upright initially, then the hydraulic control switch is started in the control room on the construction ship, the vibration hammer 8 reciprocally vibrates and sinks under the action of the hydraulic pressure, the vibration is transmitted through the vibration sinking frame 6, and the main plates 1 are buried under the seabed.

[0044] It should be noted that after the main plate 1 is buried under the seabed, the flying line is lowered by the construction ship crane, and the diver pulls the flying line to the interface of the two connecting devices respectively, and after connection, the flying line is placed on the upper surface of the flying line beam 2; wherein the liquid flying line is heavier and needs to be placed in the horizontal disc, and a proper amount of floating bag is installed at the end of the flying line to make the liquid flying line basically suspended, and then the diver moves the liquid flying line above the main plate 1, and removes the floating bag one by one, so that the liquid flying line is placed on the upper surface of the flying line beam 2. After the flying line is correctly placed, the cover plate 3 and the plastic plate are lowered by the construction ship, and the diver places the cover plate 3 between the main plate 1 and abuts against the flying line beam 2, completely covering the flying line; for the gap between the two adjacent seabed flying line protection devices, the diver cuts the plastic plate to match the size of the gap according to the shape and size of the gap, and places it under the cover plate to press and block the gap.

[0045] Example two:

[0046] Referring to Figure 1 , Figure 3 and Figure 4 , on the basis of example one, the vibration sinking frame 6 described in this embodiment is divided into two ends of the main plate 1 and is welded with the main plate 1. The vibration sinking frame 6 is composed of two side plates 601 and a top plate 602, and the side plate 601 and the top plate 602 are welded into one body. The top plate 602 is provided with a through hole, and the vibration hammer 8 passes through the through hole and is connected with the top plate 602 through bolts. The top plate 602 is flush with the bottom of the flying line beam 2, which does not affect the installation of the flying line and the cover plate 3. In use, the hydraulic vibrator abuts against the top plate 602, the hydraulic vibrator is started, the vibration sinking frame 6 drives the main plate 1 to insert into the seabed under the reciprocating knocking of the hydraulic vibrator, part of the silt on the seabed is extruded to the outside of the main plate 1, and the remaining part enters the inside of the main plate 1 through the gap between the inclined plates 101, thereby achieving a similar meshing effect and increasing the anti-overturning ability of the main plate 1.

[0047] In order to ensure that the vibration sinking frame 6 does not deform during vibration sinking, a triangular rib plate 603 connecting the side plate 601 and the top plate 602 is arranged between the side plate 601 and the top plate 602, which increases the structural rigidity between the top plate 602 and the side plate 601.

[0048] Example three:

[0049] For the laying of seabed flying line, some are directly laid on the seabed, and some are covered with sandbags. However, in actual use, the sandbags are easily washed away by seawater or dragged away by fishing nets, causing the flying line to be exposed. At this time, the ship anchor, fishing net, etc. is easy to drag the flying line, and causes the flying line to be broken, affecting the operation of offshore oil and gas fields. However, the cylindrical or square tube-shaped protection groove cannot well squeeze the sand to the two sides when inserted into the seabed, resulting in a large pressure required when pressing down the protection groove, and it is difficult to completely bury the protection groove into the seabed; secondly, the cylindrical or square tube-shaped protection groove is still easy to be dragged away when hooked by the ship anchor, fishing net, etc. because it does not form a cooperative relationship with the seabed mud surface, causing the flying line inside to be damaged.

[0050] Therefore, in order to solve the above problems, as shown in Figure 1 The seabed flying line protection device provided by the embodiment comprises two parallel main plates 1 and a flying line beam 2, the flying line beam 2 is provided with a placing groove for placing the flying line, the two ends of the flying line beam 2 are fixedly connected with the two main plates 1 respectively, and a vibration sinking frame 6 is further fixedly connected between the two main plates 1, and a vibration hammer 8 is detachably fixedly connected on the vibration sinking frame 6. A cover plate 3 is arranged on the top of the main plate 1 for covering, the bottom of the main plate 1 is inwardly bent towards the flying line beam 2 to form an inclined plate 101, and a gap is left between the inclined plates 101. The main plate 1 and the flying line beam 2 in the embodiment are both made of common carbon steel, and the surface is sprayed with anticorrosive paint. The total height of the main plate 1 is 500 mm, and the length is 3000-5000 mm, which can be cut according to the actual situation on site. The bending position on the main plate 1 is located in the middle lower part, and the distance from the top surface of the main plate 1 is 300 mm. The inner angle between the inclined plate 101 formed after bending and the main plate 1 is 120°. If the inner angle formed by the inclined plate 101 and the main plate 1 is too small, the seabed sand cannot be squeezed to the outside, causing the vibration sinking process to be labor-saving; and if the inner angle is too large, the sand cannot provide enough downward pressure between the two main plates 1, affecting the overturning resistance of the main plate 1.

[0051] When laying, the welded main plate 1 and the flying wire beam 2 are lowered to the flying wire path on the seabed on the construction ship by winch, and the main plate 1 and the flying wire beam 2 are vibrated and sunk by the vibration hammer 8, and are driven into the silt on the seabed until the top of the main plate 1 is flush with the mud surface. Then, the flying wire is lowered by the crane of the construction ship, and is placed on the placing groove on the flying wire beam 2. Finally, after the flying wire is connected, the cover plate 3 is covered, and the laying of the seabed flying wire protection device is completed. During the vibration and sinking process, the inclined plates 101 at the bottom of the main plate 1 extrude part of the silt to the outside of the main plate 1, and the rest of the silt enters the inside of the main plate 1 through the gap between the two inclined plates 101, and the silt on the inside and outside of the main plate 1 extrudes the inclined plates 101 together. When subjected to a lateral external force (due to the ship anchor or fishing net dragging), the silt on the inside can greatly prevent the main plate 1 from tilting and overturning, thereby avoiding the dragging of the ship anchor or fishing net on the embodiment, and achieving the effect of protecting the flying wire.

[0052] At the same time, when the main plate 1 is buried in the silt or pulled out of the silt, the silt can flow through the gap between the two main plates 1, which is beneficial to reduce the resistance of falling or pulling out, and is more labor-saving than the completely sealed protection groove during installation or pulling out. After installation is completed, the main plate 1, the flying wire beam 2 and the cover plate 3 are placed below the mud surface as a whole, without protruding parts, and are not easy to be dragged by the ship anchor, fishing net and the like; generally, the ship anchor and the like sink into the mud surface by about 5-10 cm, and even if the ship anchor and the like are dragged to the main plate 1, since the main plate 1 is long and provides a large anti-overturning force, and the center of gravity of the ship anchor is above the cover plate 3 and the silt has a stabilizing effect, the ship anchor will overturn and jump over the cover plate after touching the main plate 1, and will not cause dragging in actual use.

[0053] Embodiment Four:

[0054] As shown in Figure 1 or Figure 2 , on the basis of embodiment three, the flying wire beam 2 has a structure that the two ends are protruding parts and the middle is a recess, and the recess is a placing groove for placing the flying wire. The protruding parts at the two ends are connected with the cover plate 3 by buckling, and no additional auxiliary tools are needed when installing the cover plate 3 in the underwater environment, which is convenient to operate. The upper surface of the protruding part is 20 mm away from the top of the main plate 1, and the thickness of the cover plate 3 is also 20 mm, so that when the cover plate 3 is installed on the flying wire beam 2, it is ensured that the cover plate 3 will not protrude out of the main plate 1.

[0055] The placement groove of the flying wire beam 2 is provided with several first through holes 501. While ensuring the strength of the flying wire beam 2, if the mud and sand reach the bottom of the flying wire beam 2 during the vibration and sinking process, they can seep upward through the first through holes 501 to reduce the downward resistance. When the seabed flying wire protection device needs to be pulled out and the mud and sand between the main board 1 buries the flying wire beam 2, the mud and sand can also leak downward through the first through holes 501 to reduce the resistance when pulling it out.

[0056] Furthermore, to protect the metal structures of the motherboard 1 and cover plate 3 from seawater corrosion, the inner sides of the motherboard 1 and cover plate 3 are respectively provided with a first sacrificial anode 401 and a second sacrificial anode 402, which are made of aluminum alloy. Under the immersion and corrosion of seawater, the first sacrificial anode 401 and the second sacrificial anode 402 will be preferentially consumed due to electrochemical corrosion, thereby protecting the motherboard 1 and cover plate 3.

[0057] Example 5:

[0058] like Figure 1 As shown, based on any of the above embodiments, this embodiment also welds an inner reinforcing rib plate 7 between the two main plates 1. The inner reinforcing rib plate 7 is made of high-carbon steel, and its outer surface is also coated with anti-corrosion paint. The inner reinforcing rib plate 7 is an inverted trapezoid, with its two inclined sides welded to the two inclined plates 101 respectively. The short side of the inner reinforcing rib plate 7 is flush with the gap formed between the main plates 1. The inner reinforcing rib plate 7 can increase the structural rigidity of the main plate 1, ensuring that the main plate 1 does not undergo plastic deformation during the sinking process. It can also lower the center of gravity of the seabed flyline protection device, improving its anti-overturning ability, so that it is not easily dragged when caught by anchors, fishing nets, etc. At the same time, when the main plate 1 is lowered to the seabed by the winch, due to the influence of the center of gravity of the inner reinforcing rib plate 7, the main plate 1 can maintain the correct descent angle during the lowering process and will not overturn.

[0059] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A seabed flying lead protection device, comprising two parallel main plates (1) and a flying lead beam (2), the flying lead beam (2) being provided with a placing groove for placing a flying lead, and the flying lead beam (2) being fixedly connected with the two main plates (1) at two ends thereof, characterized in that, The main plates (1) are also fixedly connected with a vibration sinking frame (6), and the vibration sinking frame (6) is detachably fixedly connected with a vibration hammer (8); the vibration hammer (8) comprises a vibration hammer main body (801) and a connecting plate (802) which are fixedly connected, and the connecting plate (802) is connected with the vibration sinking frame (6) through bolts; the vibration hammer main body (801) is provided with a hydraulic oil inlet (803) and a hydraulic oil outlet (804); the bottom of the main plate (1) is bent towards the flying wire beam (2) to form an inclined plate (101), gaps are left between the inclined plates (101), and the inner angle between the inclined plate (101) and the main plate (1) is 100° 140°.

2. A seabed flying lead protector according to claim 1, characterised in that, The vibration sinking frame (6) is composed of two side plates (601) and a top plate (602), the two side plates (601) are fixedly connected with the two main plates (1) respectively, and the top plate (602) is flush with the bottom of the flying wire beam (2); a plurality of triangular rib plates (603) connecting the two are arranged between the side plates (601) and the top plate (602).

3. A seabed flying lead protector according to claim 1, characterised in that, The top of the main plate (1) is further provided with a cover plate (3) for covering, and the flying wire beam (2) has a structure of protruding at both ends and recessed in the middle, the recess is a placing groove for placing the flying wire, and the protruding parts at both ends are connected with the cover plate (3).

4. A seabed flying lead protector according to claim 3, characterised in that, The inner side of the main plate (1) is provided with a plurality of first sacrificial anodes (401), and the bottom of the cover plate (3) is provided with a plurality of second sacrificial anodes (402).

5. A seabed flying lead protector according to claim 4, characterised in that, It also includes an inner reinforcing rib plate (7), which is an inverted trapezoid, and the two inclined edges are fixedly connected with two inclined plates (101).

6. A method according to any one of claims 1 5. A method of installing a seabed flying lead protector according to any one of claims 1 The steps include: Step S1, after the underwater manifold and the underwater Christmas tree are installed, the connection ports of the two devices are positioned, and the installation path of the seabed flying wire protection device is set; Step S2, the seabed flying wire protection device is lowered to the seabed from the construction ship by winch, and the diver moves it above the installation path set in step S1; Step S3, the diver inserts the male head of the hydraulic pipeline into the hydraulic oil inlet (803) and the hydraulic oil outlet (804) provided on the vibration hammer (8), after initially maintaining the main plate (1) upright, the hydraulic control switch is started, the vibration hammer (8) reciprocates under the action of hydraulic pressure, and the main plate (1) is buried in the seabed through the vibration transmission of the vibration sinking frame (6); Step S4, the installation of the main body of the seabed flying wire protection device is completed, and the hydraulic pipeline is recovered; Step S5, after the flying wire is laid, the seabed flying wire protection device is closed.

7. A method of installing a seabed flying lead protector according to claim 6, characterised in that, The step S5 includes the following steps: Step S51, the flying wire is lowered by the crane of the construction ship, and the diver pulls the flying wire to the interfaces of the two connected devices respectively, and then places the flying wire on the upper surface of the flying wire beam (2); Step S52, after the flying wire is correctly placed, the cover plate (3) and the plastic plate are lowered from the construction ship, and the diver places the cover plate (3) between the main plates (1) and abuts against the flying wire beam (2), completely covering the flying wire; Step S53, for the gap between the two adjacent seabed flying wire protection devices, the diver cuts the plastic plate to match the size of the gap according to the shape and size of the gap, and places it under the cover plate (3) to block the gap.

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